| 1 |
exp Nigeria/ |
| 2 |
exp vital statistics/ |
| 3 |
(incidence* or prevalence* or morbidity or mortality).tw. |
| 4 |
(disease adj3 burden).tw. |
| 5 |
exp “cost of illness”/ |
| 6 |
case fatality rate.tw |
| 7 |
hospital admissions.tw |
| 8 |
Disability adjusted life years.mp. |
| 9 |
(initial adj2 burden).tw. |
| 10 |
exp risk factors/ |
| 11 |
2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 |
| 12 |
exp chronic obstructive lung disease / or copd / or chronic obstructive airway disease / or chronic bronchitis /or emphysema |
| 13 |
1 and 11 and 12 |
| 14 |
Limit 13 to “1990-current” |